@ jonnyc : Im not saying it isnt ok, just asking the questions.
@ RR : I think youve missed my point Robin , and I have seen the completed article. maybe I just havent explained it well enough.
a long piece of pipe is normally supported in someway between 2 end points , either rigid or flexible
(bit like an exhaust I guess). its just a difference between the 2 kits, Im not pushing either side as better.
many dont have a support bracket , but then thye dont have as much as 2 filters_casings to support
all good